bad stat ?

my issue is = the furnace runs per normal, then shuts off. then it starts right back up and runs for 1 min to several mins, it varies , then shuts off. i have new batteries in the stat, no difference. i am figuring that the stat is bad. but could it be something else ? i am getting a new stat today to try out.

bad stat ?

i will check the filter, but it was replaced not long ago.
registers are the same.
A-coil was cleaned 1 year ago. and it was NASTY. mostly dog hair. we never had a dog.
the blower wheel does need to be cleaned. but it looked ok last year, and it blows just fine.

this issue just started about 1 month ago.

stat is set to come on at 72, and it goes off at 74. but when it goes right back on, the temp is 73, not 72.